Answer Happy

A research group wants to test if alcohol intake (none, up to two drinks, more than two drinks) and the use of anxiety medication (none, low dosage, large dosage) affect driving ability independently or if they interact in explaining driving ability. How many levels does the variable "alcohol intake" have, as described above? 0 1 1 2 3 1-2 2+

Use the following cross-product (ZxZy) data to calculate the correlation coefficient. 2.48, 1.65, 42, .11, -.00, .01, -.01, 55, 1.48, 2.95 9.640 .876 1.964 1.071